const int A = 0;
const int B = 1;
const int C = 2;
const int D = 3;
const int E = 4;
const int F = 5;
const int G = 6;

void setup()  {

pinMode(A, OUTPUT);
pinMode(B, OUTPUT);
pinMode(C, OUTPUT);
pinMode(D, OUTPUT);
pinMode(E, OUTPUT);
pinMode(F, OUTPUT);
pinMode(G, OUTPUT);

}

void loop() {
 digitalWrite(A, HIGH);
 delay(1);
 digitalWrite(B, LOW);
 delay(1);
 digitalWrite(C, LOW);
delay(1);
digitalWrite(D, HIGH);
delay(1);
digitalWrite(E, HIGH);
delay(1);
digitalWrite(F, HIGH);
delay(1);
digitalWrite(G, HIGH);
}